regnumWiktionary 原文演变路径（由近及远）英语借自 ←拉丁语 rēgnum “kingdom”词源说明From Latin rēgnum (“kingdom”). Doublet of reign.释义（英文）名词 Noun(biology, taxonomy) A rank in the classification of organisms, below dominium and above divisio.A badge of royalty, especially the early form of the pope's tiara.词族同源异形词（1）reign